Abdullah bin Harith bin Jaz'(RA) said, I never saw anyone smile more than the messenger of Allah.

Abu Dharr (RA) narrated : The Prophet(SAW) said to me : "Do not disdain any good deed, even if it is meeting your brother with a cheerful face."

 

Abu Dharr (RA) narrated : Allah's Messenger (SAW) said, "Your smiling at the face of your brother is a charity for you."
 

Aisha (RA) narrated: I never saw The Prophet (SAW) laughing to an extent that one could see his palate, he used to smile (only).